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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-09 10:38:09 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-27 09:59:54 -0800 |
| commit | 22ad0b6ab46683975c6da032f1c2593066c7b3bd (patch) | |
| tree | e4868123c476d3a4ebcdec04b50263ae49acd80a /fs/f2fs/debug.c | |
| parent | 5e8256ac2e378089a1bf3fae87370811b1d31625 (diff) | |
| download | linux-22ad0b6ab46683975c6da032f1c2593066c7b3bd.tar.bz2 | |
f2fs: add bitmaps for empty or full NAT blocks
This patches adds bitmaps to represent empty or full NAT blocks containing
free nid entries.
If we can find valid crc|cp_ver in the last block of checkpoint pack, we'll
use these bitmaps when building free nids. In order to avoid checkpointing
burden, up-to-date bitmaps will be flushed only during umount time. So,
normally we can get this gain, but when power-cut happens, we rely on fsck.f2fs
which recovers this bitmap again.
After this patch, we build free nids from nid #0 at mount time to make more
full NAT blocks, but in runtime, we check empty NAT blocks to load free nids
without loading any NAT pages from disk.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/debug.c')
| -rw-r--r-- | fs/f2fs/debug.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c index de8da9fc5c99..015ad2b73a92 100644 --- a/fs/f2fs/debug.c +++ b/fs/f2fs/debug.c @@ -193,6 +193,7 @@ static void update_mem_info(struct f2fs_sb_info *sbi) /* build nm */ si->base_mem += sizeof(struct f2fs_nm_info); si->base_mem += __bitmap_size(sbi, NAT_BITMAP); + si->base_mem += (NM_I(sbi)->nat_bits_blocks << F2FS_BLKSIZE_BITS); get_cache: si->cache_mem = 0; |